"Make" Visitors Auto Click Ads

I want a script to auto click on my ads. The script can be integrated in my website very easy. So I want a script/something that will "make" every Xth visitor click on my ads and have a count. When I say make, I mean, if they are on my site for more than X amount of seconds or something, it just clicks on one of my ads automatically. Exemple: If i have a website with 2k unique per days, I want to have Y clicks per 24 hours and every Xth visitor, no more that Y.